Chorionic villus sampling is a prenatal test usually performed in the second trimester.
a. true
b. false

b. False

Explanation:

Chorionic villus sampling test is used to determine the genetic disorder or chromosomal disorder in a fetus. Chorionic villus test is done by the PCR or by FISH. This test can take place usually performed in 10 to 12 weeks gestation i.e. first trimester, before amniocentesis. Chorionic villus can be removed by a needle. Pregnancy loss in CVS (Chorionic villus sampling) is 2-3 percent. So it is highly accurate.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

explanation:

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1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint